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BWRs of LWR
All of the reactors in Number 1 and Number 2 plants are BWRs of LWR.|
The cheapeast Nuclear reactors is Light Water Reactors (LWR).
LWRs can be subdivided into 3 categories:
pressurized water reactors (PWRs)
boiling water reactors (BWRs)
supercritical water reactors (SWRs)
The 5 great power countries with nuclear naval propulsion capacity:
British, Chinese, French, and American Naval vessels use LWRs.
Most of Russian Naval vessels use LWRs too.
The theory of BWRs
The pencil-thin nuclear fuel rods, each about 3.7m long, are grouped by hundreds in bundles called fuel assemblies. Complicated chemicals including uranium take part in the chain reactions. All of this reactions is enclosed in a water-filled steel pressure vessel, called the reactor vessel. (LWR)
The reactions would produce lights, or radio waves, or electromagnetic waves.The sun lights make us warm. The ultraviolet lights can kill virus. The X-rays lights can travel through fresh. The Gamma-rays lights can cut fresh. Because there is the energy, heat, or radiation, or electromagnetic radiation, in the lights.
The reactions are controlled at a steadily low speed, easily starting and stopping.
The energy, heat, in lights burns the water into steam. The steam directly drives the pwer-generating turbines. After that the stream turns into water. And this water goes back to be heated. The fuel are cooled on the contrary.
There are several shells for preventing the leaking of the energy in lights. These shells are inside of this reactor vessel and outside, such as the shell of vessel itself, the plant houses, etc.